cmd = /Volumes/Macintosh_HD/Users/zhengao/bio/Struc_features/in_data/chip-seq/cebpb/seq_files_160115/8_homer_fa/ct150_len500_hybrid/TFI/posi/4.fa human /Volumes/Macintosh_HD/Users/zhengao/bio/Struc_features/in_data/chip-seq/cebpb/seq_files_160115/9_homer_out/4/TFI/ -fasta /Volumes/Macintosh_HD/Users/zhengao/bio/Struc_features/in_data/chip-seq/cebpb/seq_files_160115/8_homer_fa/ct150_len500_hybrid/TFI/nega/4.fa